I have no info for this pallet truck, and my trouble with it, is:
don't do it anything,
when I conecct it, only close the contactor and open again.
after that (remain open the contactor) I try to use hydraulics, and only a 3 beep sound, and not have any movement.
i think is the zapi controller, because i cheched outall the wires and motors (traction & hyd), the contactor work fine (i apply direct 24v from battery).
I appreciatte all the advice and support, that you can give me.